xref: /openbmc/linux/arch/x86/include/asm/inat.h (revision 04d46c1b)

#ifndef _ASM_X86_INAT_H
#define _ASM_X86_INAT_H
/*
 * x86 instruction attributes
 *
 * Written by Masami Hiramatsu <mhiramat@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 */
#include <asm/inat_types.h>

/*
 * Internal bits. Don't use bitmasks directly, because these bits are
 * unstable. You should use checking functions.
 */

#define INAT_OPCODE_TABLE_SIZE 256
#define INAT_GROUP_TABLE_SIZE 8

/* Legacy last prefixes */
#define INAT_PFX_OPNDSZ	1	/* 0x66 */ /* LPFX1 */
#define INAT_PFX_REPNE	2	/* 0xF2 */ /* LPFX2 */
#define INAT_PFX_REPE	3	/* 0xF3 */ /* LPFX3 */
/* Other Legacy prefixes */
#define INAT_PFX_LOCK	4	/* 0xF0 */
#define INAT_PFX_CS	5	/* 0x2E */
#define INAT_PFX_DS	6	/* 0x3E */
#define INAT_PFX_ES	7	/* 0x26 */
#define INAT_PFX_FS	8	/* 0x64 */
#define INAT_PFX_GS	9	/* 0x65 */
#define INAT_PFX_SS	10	/* 0x36 */
#define INAT_PFX_ADDRSZ	11	/* 0x67 */
/* x86-64 REX prefix */
#define INAT_PFX_REX	12	/* 0x4X */

#define INAT_LSTPFX_MAX	3
#define INAT_LGCPFX_MAX	11

/* Immediate size */
#define INAT_IMM_BYTE		1
#define INAT_IMM_WORD		2
#define INAT_IMM_DWORD		3
#define INAT_IMM_QWORD		4
#define INAT_IMM_PTR		5
#define INAT_IMM_VWORD32	6
#define INAT_IMM_VWORD		7

/* Legacy prefix */
#define INAT_PFX_OFFS	0
#define INAT_PFX_BITS	4
#define INAT_PFX_MAX    ((1 << INAT_PFX_BITS) - 1)
#define INAT_PFX_MASK	(INAT_PFX_MAX << INAT_PFX_OFFS)
/* Escape opcodes */
#define INAT_ESC_OFFS	(INAT_PFX_OFFS + INAT_PFX_BITS)
#define INAT_ESC_BITS	2
#define INAT_ESC_MAX	((1 << INAT_ESC_BITS) - 1)
#define INAT_ESC_MASK	(INAT_ESC_MAX << INAT_ESC_OFFS)
/* Group opcodes (1-16) */
#define INAT_GRP_OFFS	(INAT_ESC_OFFS + INAT_ESC_BITS)
#define INAT_GRP_BITS	5
#define INAT_GRP_MAX	((1 << INAT_GRP_BITS) - 1)
#define INAT_GRP_MASK	(INAT_GRP_MAX << INAT_GRP_OFFS)
/* Immediates */
#define INAT_IMM_OFFS	(INAT_GRP_OFFS + INAT_GRP_BITS)
#define INAT_IMM_BITS	3
#define INAT_IMM_MASK	(((1 << INAT_IMM_BITS) - 1) << INAT_IMM_OFFS)
/* Flags */
#define INAT_FLAG_OFFS	(INAT_IMM_OFFS + INAT_IMM_BITS)
#define INAT_MODRM	(1 << (INAT_FLAG_OFFS))
#define INAT_FORCE64	(1 << (INAT_FLAG_OFFS + 1))
#define INAT_SCNDIMM	(1 << (INAT_FLAG_OFFS + 2))
#define INAT_MOFFSET	(1 << (INAT_FLAG_OFFS + 3))
#define INAT_VARIANT	(1 << (INAT_FLAG_OFFS + 4))
/* Attribute making macros for attribute tables */
#define INAT_MAKE_PREFIX(pfx)	(pfx << INAT_PFX_OFFS)
#define INAT_MAKE_ESCAPE(esc)	(esc << INAT_ESC_OFFS)
#define INAT_MAKE_GROUP(grp)	((grp << INAT_GRP_OFFS) | INAT_MODRM)
#define INAT_MAKE_IMM(imm)	(imm << INAT_IMM_OFFS)

/* Attribute search APIs */
extern insn_attr_t inat_get_opcode_attribute(insn_byte_t opcode);
extern insn_attr_t inat_get_escape_attribute(insn_byte_t opcode,
					     insn_byte_t last_pfx,
					     insn_attr_t esc_attr);
extern insn_attr_t inat_get_group_attribute(insn_byte_t modrm,
					    insn_byte_t last_pfx,
					    insn_attr_t esc_attr);

/* Attribute checking functions */
static inline int inat_is_legacy_prefix(insn_attr_t attr)
{
	attr &= INAT_PFX_MASK;
	return attr && attr <= INAT_LGCPFX_MAX;
}

static inline int inat_is_address_size_prefix(insn_attr_t attr)
{
	return (attr & INAT_PFX_MASK) == INAT_PFX_ADDRSZ;
}

static inline int inat_is_operand_size_prefix(insn_attr_t attr)
{
	return (attr & INAT_PFX_MASK) == INAT_PFX_OPNDSZ;
}

static inline int inat_is_rex_prefix(insn_attr_t attr)
{
	return (attr & INAT_PFX_MASK) == INAT_PFX_REX;
}

static inline int inat_last_prefix_id(insn_attr_t attr)
{
	if ((attr & INAT_PFX_MASK) > INAT_LSTPFX_MAX)
		return 0;
	else
		return attr & INAT_PFX_MASK;
}

static inline int inat_is_escape(insn_attr_t attr)
{
	return attr & INAT_ESC_MASK;
}

static inline int inat_escape_id(insn_attr_t attr)
{
	return (attr & INAT_ESC_MASK) >> INAT_ESC_OFFS;
}

static inline int inat_is_group(insn_attr_t attr)
{
	return attr & INAT_GRP_MASK;
}

static inline int inat_group_id(insn_attr_t attr)
{
	return (attr & INAT_GRP_MASK) >> INAT_GRP_OFFS;
}

static inline int inat_group_common_attribute(insn_attr_t attr)
{
	return attr & ~INAT_GRP_MASK;
}

static inline int inat_has_immediate(insn_attr_t attr)
{
	return attr & INAT_IMM_MASK;
}

static inline int inat_immediate_size(insn_attr_t attr)
{
	return (attr & INAT_IMM_MASK) >> INAT_IMM_OFFS;
}

static inline int inat_has_modrm(insn_attr_t attr)
{
	return attr & INAT_MODRM;
}

static inline int inat_is_force64(insn_attr_t attr)
{
	return attr & INAT_FORCE64;
}

static inline int inat_has_second_immediate(insn_attr_t attr)
{
	return attr & INAT_SCNDIMM;
}

static inline int inat_has_moffset(insn_attr_t attr)
{
	return attr & INAT_MOFFSET;
}

static inline int inat_has_variant(insn_attr_t attr)
{
	return attr & INAT_VARIANT;
}

#endif